Install the KingoRoot. Connect the device to the PC via an USB cable. Enable USB debugging. Click Menu button to enter into App drawer. Go to "Settings". Scroll down to the bottom and tap "About phone" or "About tablet". Scroll down to the bottom of the "About phone" and locate the "Build Number" field.
How to update system without losing root and data? Download new firmware of the phone and update the Magisk App if it is not up to date. Unzip the firmware you download and transfer the AP file to your phone.
Remove the data cable once the flashing process ends, then press and hold the Volume down + Power Button until the Samsung logo with alert appears. Release both buttons and long-press Volume Up key to enter in the recovery. Apply the factory reset setting and safely reboot your phone in the usual way.
Step 2. Boot your phone into recovery mode and go to the TWRP menu, tap on install. Step 3. Install the SuperSU file on your computer and ensure the installation process is completed well. Then, you can return to TWRP main menu,. Step 4. Reboot the whole system by tapping on the restart option on the screen, then your Android 7.0 Nougat device
Boot into Download mode: Press and hold the Volume Down, Home, and Power buttons simultaneously until you see the Download mode screen. Confirm by pressing the Volume Up button. Connect your device to the computer: Connect your Galaxy S7 to your computer using a USB cable.First, we need to enable Developer Options on Samsung Galaxy S21. Go to “Settings” on your Galaxy S21. Scroll down to the very bottom of the screen and select “About phone.”. Next, select “Software information.”. Tap on the “Build number” 5-6 times. Enter your phone’s lock screen PIN/Password/Pattern if prompted. j0Ck.